Improvement in door-bells



To all whom it may concern sents an ordinary dome-shaped bell, securedUNITED PATENT GFFCE.

WILLIAM H. NIoHoL-s, or E-Asfr .HAMPTON-CONN., AssIGNoH To THE B-nvIN:BROTHERS MANUFACTURING COMPANY, OF SAME PLACE.

IMPROVEMENT |N DooR-BELLS.

Specification forming part of Letters Patent No. 153,271, dated July 21,1874 application filed June 29, 1874.

Be it known that I, WILLIAM H. NICHOLS, of East Hampton, in the countyof Middlesex and State of Connecticut, have invented certain new anduseful Improvements in Doorfells, of which the following is a specifica-Ion My invention relates to certain new and Improved devices foroperating the hammer of an alarm or call bell; and it consists in apawl, in combination with an Eshaped or other suitably bent lever,pivoted to the upper arm of said lever at its end, and so constructedand arranged as to catch and lift one end of the lever to which thehammer is attached, and carry it a su'icient distance to allow thehammer tio-make its stroke and then release It, said pawl, on the returnof the lever-arm, yieldin g and falling back as it passes the end of thehammer-lever, so as to resume its original position when thebent leverhas returned, substantially as hereinafter described.

The E-shaped or bent lever is pivoted to the base of the standard, whichsupports the bell at its upper angle, and is raised by means of astar-shaped cam-wheel, operating against its lower arm, which may berotated in either direction by means of a key extending through the baseof the standard, or otherwise, and is returned to its original positionby means of a spring bearin g against its upper arm. The desired strokeis given to the hammer, when its lever is released from the pawl, bymeans of a spiral spring', or otherwise, as may be desired.

In the drawings, Figure 1 represents a view of my apparatus with the,bell removed, showing the working parts thereof. Fig. 2 represents asection through the center of my apparatus.

A represents the standard which supports the bell, attached to acircular or other shaped base, B, to which the various working parts ofmy apparatus are also attached. C repreto the standard A by means of ascrew upon its end. D represents the E -shaped or bent lever, pivoted atits upper angle e to the base plate B, and F is a spring attached tosaid y the hammer-lever is released by the pawl.

plate, and bearing against the upper arm oi' the lever D, to keep it inposition ready for hammer N upon its long arm. The short arm of saidlever extends inward at an angle to said long arm, and is bent upward,as shown, so that the pawl on the end of the bent or E shaped lever mayreadily engage it. To this short arm is attached one end of a spiralspring, O, the other end being secured to a stud, l?, screwed to thebase-plate B. This spring gives the stroke to the hammer, when Rrepresents the pawl, which -consists of a V- shaped lever, pivoted atits angle in a slot in the end of the bent lever D, as shown, and pushedoutward by means of a spiral spring, S, bearing against its right arm atone end, and against the end of the slot in the bent lever D at theother. The left arm of said pawl catches under the lower edge of therear end of the slot in the arm of the bent lever, and limits theoutward motion of the right arm of the V-shaped lever or pawl. T is aslot through the base-plate, directly opposite the end of the bent leverD, through which a thumb-stud attached to said lever may pass, tofurnish an additional means of operating the lever. U is a stud or stopattached to the base-plate, which limits the stroke of the hammer, andcauses the-hammer.- lever to spring back away from the bell, after thestroke has been made, so that the bell can vibrate freely.

The operation of my device is as follows: Upon raising the upper arm oi'the lever D, the pawlV lifts the end of the hammer-lever L, and carriesit upward until it passes clear of it. Being thus released, the lever ispulled violently back toits original position by mea-ns of the spiralspring O throwing,` the hammer Vhat I claim is forcibly against thebell. On the return of The combination, with the bell C, of' the thebent lever, the spring S, which bears cam-Wheel G, bent lever D, pztwlR, and hemegainst the right arm of the pewl V, yields, mer-lever L,carrying the hammer N, substanallowing the pewl to recede as it passesthe tielly as herein set forth and described. l

end of the hemmerlever. Then it has passed In testimony that I claim theforegoing I said end, the spring returns it to its original havehereunto set my hand.

position. WILLIAM H. NICHOLS.

'lhe lever l) may be operated either by Witnesses: ineens ofthe@mn-wheel or the stud, as before NATH. G. SMITH,

mentioned. CLARK BENIN.

